Planetary hours
in Cardiff.
The day, from sunrise to sunset, is cut into twelve equal hours; so is the night, from sunset to the next sunrise. Each hour carries a planet, in the Chaldean order. A planetary hour therefore lasts 60 minutes only at the equinoxes: it all depends on the date and the city. Here are the exact hours for your city; what you do with them is up to you.
Planetary day of Tuesday, 12 August 2025: day of Mars
- Sunrise
- 05:53
- Sunset
- 20:40
- Next sunrise
- 05:55
A day hour lasts 1h 14m; a night hour, 46 min. Local time (Europe/London).
Day
- 1♂︎ Mars05:53 – 07:07
- 2☉︎ Sun07:07 – 08:21
- 3♀︎ Venus08:21 – 09:35
- 4☿︎ Mercury09:35 – 10:49
- 5☽︎ Moon10:49 – 12:03
- 6♄︎ Saturn12:03 – 13:17
- 7♃︎ Jupiter13:17 – 14:31
- 8♂︎ Mars14:31 – 15:44
- 9☉︎ Sun15:44 – 16:58
- 10♀︎ Venus16:58 – 18:12
- 11☿︎ Mercury18:12 – 19:26
- 12☽︎ Moon19:26 – 20:40
Night
- 1♄︎ Saturn20:40 – 21:26
- 2♃︎ Jupiter21:26 – 22:13
- 3♂︎ Mars22:13 – 22:59
- 4☉︎ Sun22:59 – 23:45
- 5♀︎ Venus23:45 – 00:31
- 6☿︎ Mercury00:31 – 01:17
- 7☽︎ Moon01:17 – 02:04
- 8♄︎ Saturn02:04 – 02:50
- 9♃︎ Jupiter02:50 – 03:36
- 10♂︎ Mars03:36 – 04:22
- 11☉︎ Sun04:22 – 05:09
- 12♀︎ Venus05:09 – 05:55
Other cities · United Kingdom
Questions
How are the planetary hours calculated in Cardiff?
On Tuesday, 12 August 2025, the Sun rises at 05:53 and sets at 20:40: the day lasts 14h 47m, that is twelve day hours of 1h 14m. The night, until the next sunrise at 05:55, lasts 9h 15m: twelve night hours of 46 min.
Which planet rules the first hour that day?
Mars, from 05:53 to 07:07: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars again.
Today’s sky, on YOUR chart
Planetary hours are the same for everyone in a city. Your chart is yours alone: every morning AstroXP crosses the real sky with your birth, to the minute, and tells you what time it plays out for you.
On a computer? Scan this code with your phone.
Calendars
Sunrise and sunset calculated for the city (the Sun’s centre 0°50′ below the horizon: refraction and semi-diameter), local time of the city’s time zone. Checked against astronomy-engine, the app’s engine.